Modification of the Surface of Objects for the Aviation Industry by the Procedure of Hard Chrome Plating

Abstract

In the paper, the quality of the hard chrome plating on standard steel plates and shroud-fuel nozzle used in the aviation industry was examined, where the thickness of the coating, hardness, microscopic structure and resistance to bending were determined. The entire galvanization process involved chemical, electrochemical and mechanical preparation of the examined parts prior to chromating, while the chromating itself took place in a solution of chromic acid. The aim of the work is to obtain high-quality hard chrome coatings through the process of reparation of worn shroud-fuel nozzle, which will be able to replace commercial new parts in terms of quality and characteristics. Also, taking into account that some parts are no longer even commercially available, the reparation procedure should enable extended use of the same parts.